This or that?

Isn't it normal to change your mind? In anything you choose in your life? Do you ever think you found the love of your life, get married to him/her and then realize you were wrong and want to get divorced? Have you ever rented an apartment, moved to a new area and realized later that you changed your mind and you aren't happy there and to choose to move? People decide after being in a heterosexual marriage and raising children that they realize they are gay!   Understand where I am going with this???   If you answered yes to either of these questions or you can just simply understand the point I am trying to make, then how come when I apply to jobs in other fields and tell them I want to pursue a new direction with my degree they find that unbelievable? How am I supposed to know what I want to do the rest of my life? When I was a kid, I wanted to be a comedian, then an astronomer, then when I reached high school I was 100% convinced I wanted to become an attorney. I thought that was my dream at the time.  I took a practical law class my senior year, and I even had an internship the last semester of high school in the County Attorney's office. I was interning in the department of abuse & neglect dealing with child custody battles & other issues related to it. I loved the experience so much that it reinforced my desire to pursue it in college. When I began college I majored in political science, and I hated it.  I switched majors right away, but I still thought I wanted to be a lawyer.  At the end of junior year I took the LSAT class, and in the middle of studying for the LSAT's, I began to be so dissuaded to pursue a legal career that I realized being a lawyer was not for me.  I ended up cancelling my scheduled date to take the LSAT and never looked back. I took a semester off after graduating with my B.A.and thought teaching would was the career for me to embark on because I always wanted to do something that I found rewarding and fulfilling.  So, at the time I thought majoring in elementary education would be great because I love children and wanted to give back and help them have a great successful future.  I also have a great deal of empathy for children because I remember what it was like growing up and the issues I faced, socially and academically.  It is hard to fit in and children are very superficial and cruel, and I had a lot of teachers and even a guidance counselor be very dissuasive and not believe in me; as well as teachers in my earlier years not caring about how children treat their classmates.  So it hit close to home.  I also value education, and I love to learn and I think it is a every child's birthright to get the utmost, proper, valuable education in order for them to succeed in every facet of life. After completing my graduate degree in this field and teaching, I began to question if teaching was my calling.
 I admire people I met/meet along the way who always knew since they were young what exact career they wanted to pursue and even ended up going down that path as adults.  But when you think about it, how many people really know what they want to do with the rest of their life?  When you delve into it some more, choosing a career is a very big decision to make.  You spend most of your time at work, devoting yourself physically, mentally and emotionally, working hours upon hours to devote yourself to the job and be promoted.  It is equivalent to finding the perfect partner to marry.  There is a very fine line between a career and a marriage.  
I feel like I am one of the few that could relate to this.  Over the past year applying to various jobs related to my degree and experience, you wouldn't believe the amount of criticism I have received! I have gotten various phone calls out of the wood work regarding my administrative experience from job sites such as Career Builder. One recruiter from San Francisco, he ran the HR department from a major investment bank worldwide (this is all anonymous) called me about an administrative assistant position that was available. He gave me  an overview about the company in case I were to be considered for an interview.  He informed me about what the job entailed, how professional you have you to be, how the people that manage this bank are from Europe so you have to know how to impress people. All of that was proper, standard requirements for this type of role at this particular company.  Until, he saw that I have a m.s. in teaching:  He basically laughed a ridiculous laugh, and said to the effect "you got a master's in education and do not even want to pursue teaching?" I'll never forget it.  Months later he popped up on my LinkedIn.  What a douche.  It  all made sense: His picture displayed how much of an obnoxious jack*** he is.  I'm glad he got his life all figured out & he's perfect!  His LinkedIn picture displays this stupid expression on his face with muscles standing out side of sunny San Francisco dressed in casual attire and a pair of aviators like he's an Adonis.  It's amazing how just by looking at a picture it reflects a glimpse into a person's character!  I'm glad that while living under that rock for so many years he was able to work out to maintain that meathead physique.  Anyway back to reality. I am happy and proud of myself for how far I have come.  I know my education and additional experience I have acquired is transferable to begin another path just like anything in life.